A small amount of brown blood is not menstruation, because normal women’s menstrual blood is dark red and is about 20-60ml each time. If the patient has this symptom exactly to the time of menstruation, you can continue to observe, if the color is dark red and become more after 2-3 days, it means that the menstruation has come, if after 2-3 days it is still the same phenomenon, if you are married women of childbearing age, to exclude the possibility of pregnancy. If it is not pregnancy, it means that the menstrual flow is too small, and it should be considered that the uterine lining is thinning or damaged, and it is necessary to go to the hospital for further examination and treatment.